Difference between revisions of "Poa pratensis subsp. irrigata"
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|subfamily=Poaceae subfam. Pooideae | |subfamily=Poaceae subfam. Pooideae | ||
|tribe=Poaceae tribe Poeae | |tribe=Poaceae tribe Poeae | ||
Latest revision as of 16:25, 11 May 2021
Plants moderately densely to loosely tufted, sometimes forming turf, culms solitary. Basal branching mainly extravaginal. Culms 8-30(50) cm. Innovation shoot blades usually shorter than 15 cm, 2-4.5 mm wide, adaxial surfaces usually glabrous; cauline blades flat. Panicles 2-10 cm, broadly pyramidal, open, with 1-2(5) branches per node; branches 1.5-6 cm, widely spreading, smooth or sparsely to moderately scabrous, with 4-8 spikelets. Spikelets lanceolate to broadly lanceolate, not bulbiferous; florets normal. Glume keels distinct, sparsely to moderately scabrous; lower and upper glumes often nearly equaling the lowest lemmas, often noticeably glaucous; lemmas 3-5(6) mm, finely muriculate, lateral veins glabrous; palea keels scabrous, glabrous, intercostal regions glabrous. 2n = 54, 56, 65, 80, 82-147.
Discussion
Poa pratensis subsp. irrigata is poorly understood in the Flora region. As interpreted here, it includes subarctic to boreal, coastal and lowland plants that differ from those of subsp. pratensis in their primarily extravaginal branching, shorter stature, wide, flat blades, short, stout panicles with fewer branches, larger spikelets, and relatively longer glumes that are often pruinose.
Selected References
None.